How do you setup bbPress for french users/english admin?

For the record — I am completely and totally new to bbPress but I have a pretty good knowledge of wordpress and themes.

I am setting up a forum for french speaking people so the interface has to be completely french BUT, I am english and need the admin area to be english. We installed version 1.0.2 thinking we could get a plugin but now I wonder if I have the right installation.